| 铝合金表面脱氧化物/出光处理技术研究 |
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| 引用本文： | 郭瑞光,耿志良,刘晟.铝合金表面脱氧化物/出光处理技术研究[J].电镀与涂饰,2007,26(7):1-4. |
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| 作者姓名： | 郭瑞光 耿志良 刘晟 |
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| 作者单位： | 西安建筑科技大学环境与市政工程学院,陕西,西安,710055;西安建筑科技大学环境与市政工程学院,陕西,西安,710055;西安建筑科技大学环境与市政工程学院,陕西,西安,710055 |
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| 基金项目： | 国家自然科学基金
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教育部留学回国人员科研启动基金
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陕西省教育厅资助项目 |
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| 摘 要： | 以含有较多较难去除的含铜金属间化合物黑色颗粒的铝合金2024-T3为研究对象,通过金相观察,开发了一种用于碱蚀后铝合金表面脱氧化物/出光的浓–稀两阶段处理技术。室温下先用含有5.0g/LNaHF2和100g/LFe2(SO4)3的30%(质量分数)硝酸溶液处理7min,然后用含有0.5g/LNaHF2的1%(质量分数)硝酸溶液处理4min,可有效去除碱洗后铝合金表面的黑色氧化物,形成无污染的氧化铝薄层。该工艺简单、快速、成本低,为后续转化反应的顺利进行奠定了基础。
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| 关 键 词： | 铝合金 转化膜 表面准备 脱氧化物 出光 金相学 |
| 文章编号： | 1004-227X（2007）07-0001-04 |
| 修稿时间： | 2006-11-13 |
Oxide-removing/desmutting technology for surface preparation of aluminum alloys |
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| GUO Rui-guang,GENG Zhi-liang,LIU Sheng.Oxide-removing/desmutting technology for surface preparation of aluminum alloys[J].Electroplating & Finishing,2007,26(7):1-4. |
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| Authors: | GUO Rui-guang GENG Zhi-liang LIU Sheng |
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| Abstract: | An Al alloy 2024-T3 with high concentration of hard-to-clean Cu-containing intermetallic particles was studied and a two-step technology using concentrated and diluted HNO3 solutions successively for oxide-removing/desmutting of alkaline-etched Al alloy was developed based on metallo- graphic analysis. Treating with 30% (mass fraction) HNO3 5.0 g/L NaHF2 100 g/L Fe2(SO4)3 solution at room temperature for 7 min and subsequently with 1% (mass fraction) HNO3 0.5 g/L NaHF2 solution for 4 min can effectively remove contaminants on Al alloy surface after alkaline cleaning, resulting in a thin Al oxide layer without contaminants. The method is simple, fast and cost-effective. The treated surface is ready for the subsequent conversion reaction. |
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| Keywords: | aluminum alloy conversion coating surface preparation oxide-removing desmutting metallography |
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